Hemstitch sewing-machine.



PAIENTED DEC. 6, 1901 9;

0. M. ABERC ROMBI-En HEMSTITOH SEWING MACHINE.

-APPLIOATION FILED FEB. 19, 1903.

N0 MODEL.

INVENTOH W/TNESSES:

sip/W5 A from/E r .No. 776,822. PATENTED DEG. 6, 1904.

0. M. ABERGROMIBIE.

HEMSTITGH SEWING MACHINE.

APPLICATION FILED FEB. 19, 1903.

2 BHEBT8-1BHBBT 2 N0 MODEL.

(NVENTO/Y flw xlzz,

, WITNESSES: Qua/5 I A TTOH/VE Y TTED STATES Patented December 6, 1904:"

CHARLES M. ABERCROMBIE, OF BRIDGEPORT, CONNECTICUT, ASSIGNOR TO WHEELER & WILSON MAN UFACTURING- COMPANY, OF bRIDGE- PORT, CONNECTICUT, A CORPORATION OF CONNECTICUT.

HEIVISTITCH SEWING-MACHINE.

SIPECIFICATION forming part of Letters Patent No. 776,822, dated December 6, 1904, Application filed February 19, 1908. Serial No- 144,096. No model- To all whom it Til/Coy concern:

Be it known that I, CHARLns M. ABEROROM- mm, a citizen of the United States, residing at Bridgeport, in the county of Fairlield and State of Connecticut, have invented a certain new and useful Improvement in Hemstitch SewingWIachines, of whichthe following is a full, clear, and exact description.

This invention relates to hemstitch sewingmachines, and especially high-speed machines; and its object is to provide simple and durable mechanism for shifting the needle transversely to the feeding-line of the material, so as to overseam the edge of the lfem.

The invention consists in an oscillatory frame carrying a reciprocating needle and pivoted to the overhanging arm after the manner of a pendulum and capable of movement transversely to the feed of the material, said movement being imparted by a rotary cam and suitable connections between said frame and cam, the frame having a transverse slot near its lower end engaged by a stud fast on the arm to limit the movements of the frame.

In the accompanying drawings, illustrating the invention, in both figures of which like parts are similarly designated, Figure 1 is a front elevation of a hemstitch-machine, partly broken away, with the face-plate removed; and Fig. 2 is an end elevation.

1 is the bed-plate, having the overhanging arm 2.

3 is the usual d riving-shaft, journaled Within the overhanging arm 2 in any suitable manner and carrying at its forward end the usual needle-bar-actuating crank-pin 4:.

5 is the presscr-bar, provided with any suit able cloth-presser 6, and 7 is the usual feedpoint, mounted upon the feed-bar 8 and actuated by the usual or any approved feed mechanism, the shown parts of which are designated 9.

10 is an oscillatory frame pivoted at its upper end after the manner of a pendulum upon a stud 11, rigid on the arm 2. 12 is a headed stud fast on arm 2 and passed through a short transverse slot 13 at the lower part of said frame for the purpose of properly guiding and steadying said frame in its vibratory movements and also for preventing any movement 5 of said arm transversely to the vibratory movement or away from the arm. 14: is the needlebar, mounted in suitable bearings 15, formed on said frame, and 16 is the needlebar collar, to which is pivoted in the usual or any approved manner the lower end of the needle-bar-actuating link 17, the upper end of which link is pivoted to the crank-pin 4E. The joints between the link and the crankpin and collar are such as to prevent any cramping action taking place during the some what limited oscillations of the frame 10.

18 is a grooved cam for actuating the 0s cillatory frame 10, preferably journaled upon a stud 19, secured to the arm, said cam being 5 driven by intermeshing gears 20 21, herein shown conventionally and being of well-known character.

22 is a lever pivoted to the arm 2 at 23 and carrying at its upper end an antifriction-roller 7 24, which tracks within the groove in the cam 18. 25 is an undercut groove formed in the outer face of said lever 22 at the heel end thereof, and 26 is an adjustable slide-block within said groove which may be adjusted to any desired position throughout the length of said groove by a thumb-nut device 27 in any usual manner. 28 is a link, one end of which is pivoted to said slide-block and its other end pivoted to a stud 29 on the frame 10 near the 30 lower end of the same.

The shape of the cam 18 is such as to effect the movements of the oscillatory frame 10 and the needle-bar and needle in proper time and in conjunction with the feed movements of 5 the material to effect the overseaming of the hem. The movement of the cam is transmitted to the lever 22, which in turn communicates movement to the oscillatory frame through the link 28, and in order to increase 9 or diminish the amplitude of said frames oscillations the slide-block 26 is shifted to the desired position within the undercut groove 24 and there secured by tightening the thumbnut 27 in the usual manner.

Parts herein shown and not particularly dcscribed may be of any approved construction, and particularly of the character used in the Well-known WVheeler & WVilson hemstitch sewing-machine.

the line of feed of the work, and a reciproeating needle-carrying bar mounted in said frame, in combination with a rotary cam, a lever in engagement with said cam and vibrated by it, and a link connection between said lever and oscillatory frame.

2. In a hernstitch sewing-machine, having an overhanging arm, an oscillatory frame pivoted at its upper end to said arm, and having a transverse slot near its lower end, astud fast on said arm and engaging said slot, said frame capable of movement transversely to the line of feed of the work, and a reciprocating needle-carrying bar mounted in said. frame, in combination with a rotary cam, a lever in engagement with said cam and vibrated by it, and an adjustable link connection between said lever and oscillatory frame.

In testimony whereof I have hereunto set my hand this 18th day of February,A. D. 1903.

CHARLES M. ABERCROMBIE.

\Vitnesses:

F.- W. OSTROM, G. N. WORTHEN.- 

